Region Variable Trigger

01-17-2003, 05:17 PM

Guest

I need a trigger to set a region variable to the region that a specific unit is in. And let me make these things clear:

1)* I don't want to loop through an array of region variables. This is the way I am doing it currently. Is there a better way?

2) I don't want any kind of enter region events. I need to get it WHILE the unit is in the region.

3)I don't want to make a trigger for each region...thats the reason I was using method 1*

Hope this makes sense...

thanks for any help.

01-17-2003, 07:21 PM

FM_TertiaryEye

Looks like you just need a region comparison, Ive seen one advertised before on a much earlier post, yet ive had trouble finding it. So heres how we can possibly compare regions. (im pretty sure that other function does this the same way)

Since a region is defined by 4 real values, (Xmin, Ymin, Xmax, Ymax) its just a matter of comparing those 4 numbers. If you compare the 4 numbers then you have a function to compare regions with.

Im writing one and testing it now, ill bring my results back to this thread.

FM_TertiaryEye

01-17-2003, 07:40 PM

Guest

Nope, sorry thats not what I need. I can do a region comparison...but that's unrelated.

I'm am making this crazy trigger for an RPG. I think the looping through an array is the best way. It looks something like:

//Psuedo trigger/////////////////////////////////////////////
For 0 to NumOfRegions do:
If Unit is in RegionArray(Integer A) = true then
Set UnitsRegion = RegionArray(Integer A) else
Do nothing
//Psuedo trigger/////////////////////////////////////////////

You get the idea.

01-17-2003, 08:44 PM

FM_TertiaryEye

Well in that case you simply have to use:
RectContainsUnit(Region, Unit)
Which you are probably doing already/

Looping is basically the only way to do this without using a unit enters region event. The reason you cant get a region from a single point, is because that point could be in several regions at once.

Heres the region API just for reference. There are some pretty neat functions in there, like moving regions that might help if you really dont want to use the loop, however using the loop will work fine IMHO, and unless you have hundreds of regions i doubt it will cause you much problem even on a .1 interval.

Code:

native Rect                     takes real minx, real miny, real maxx, real maxy returns rect
native RectFromLoc              takes location min, location max returns rect
native RemoveRect               takes rect whichRect returns nothing
native SetRect                  takes rect whichRect, real minx, real miny, real maxx, real maxy returns nothing
native SetRectFromLoc           takes rect whichRect, location min, location max returns nothing
native MoveRectTo               takes rect whichRect, real newCenterX, real newCenterY returns nothing
native MoveRectToLoc            takes rect whichRect, location newCenterLoc returns nothing

native GetRectCenterX           takes rect whichRect returns real
native GetRectCenterY           takes rect whichRect returns real
native GetRectMinX              takes rect whichRect returns real
native GetRectMinY              takes rect whichRect returns real
native GetRectMaxX              takes rect whichRect returns real
native GetRectMaxY              takes rect whichRect returns real

native CreateRegion             takes nothing returns region
native RemoveRegion             takes region whichRegion returns nothing

native RegionAddRect            takes region whichRegion, rect r returns nothing
native RegionClearRect          takes region whichRegion, rect r returns nothing

native RegionAddCell           takes region whichRegion, real x, real y returns nothing
native RegionAddCellAtLoc      takes region whichRegion, location whichLocation returns nothing
native RegionClearCell         takes region whichRegion, real x, real y returns nothing
native RegionClearCellAtLoc    takes region whichRegion, location whichLocation returns nothing

native Location                 takes real x, real y returns location
native RemoveLocation           takes location whichLocation returns nothing
native MoveLocation             takes location whichLocation, real newX, real newY returns nothing
native GetLocationX             takes location whichLocation returns real
native GetLocationY             takes location whichLocation returns real   

native IsUnitInRegion               takes region whichRegion, unit whichUnit returns boolean
native IsPointInRegion              takes region whichRegion, real x, real y returns boolean
native IsLocationInRegion           takes region whichRegion, location whichLocation returns boolean

// Returns full map bounds, including unplayable borders, in world coordinates
native GetWorldBounds           takes nothing returns rect

Heres the region comparison function i just wrote and its test cases. (for anyone else whose interested)

Code:

// Region Comparison Trigger
// 17 Jan 03 - FM_TertiaryEye
// [email][email protected][/email]

function IsSameBounds takes rect region1, rect region2 returns boolean

    if GetBooleanOr(GetRectMinX(region1) != GetRectMinX(region2), GetRectMinY(region1) != GetRectMinY(region2)) then
       return false
    endif

    if GetBooleanOr(GetRectMaxX(region1) != GetRectMaxX(region2), GetRectMaxY(region1) != GetRectMaxY(region2)) then
       return false
    endif

    return true

endfunction

function Trig_RegionTest_Actions takes nothing returns nothing

    local rect RegionVariable

    // Testing Two Matching Regions (same bounds)
    if IsSameBounds(gg_rct_A, gg_rct_C) then
        call DisplayTextToForce(GetPlayersAll(), "Region A shares bounds with Region C:" + " Passed")
    else
        call DisplayTextToForce(GetPlayersAll(), "Region A shares bounds with Region C:" + " Failed")
    endif
    
    // Testing two regions with same size but not same bounds
    if IsSameBounds(gg_rct_A, gg_rct_B) then
        call DisplayTextToForce(GetPlayersAll(), "Region A does not share bounds with Region B:" + " Failed")
    else
        call DisplayTextToForce(GetPlayersAll(), "Region A does not share bounds with Region B:" + " Passed")
    endif
    
    set RegionVariable = gg_rct_A
    set udg_CurrentRegion = gg_rct_B

    // Testing a region with an assigned local and global variable
    if IsSameBounds(gg_rct_A, gg_rct_C) then
        call DisplayTextToForce(GetPlayersAll(), "Region A shares bounds with Region C" + " Passed")
    else
        call DisplayTextToForce(GetPlayersAll(), "Region A shares bounds with Region C" + " Failed")
    endif

endfunction

//===========================================================================
function InitTrig_RegionTest takes nothing returns nothing
    set gg_trg_RegionTest = CreateTrigger(  )
    call TriggerRegisterPlayerChatEvent( gg_trg_RegionTest, Player(0), "-test", true )
    call TriggerAddAction( gg_trg_RegionTest, function Trig_RegionTest_Actions )
endfunction

01-17-2003, 09:37 PM	#5
Guest	Good point...about point being in more than one region. I am going to have to get creative with this thing. Btw: I was just using triggers, but that custom text looks easy...like C++. I'll have to check that out. Thanks.